static APR_INLINE apt_bool_t mpf_rtp_event_send(mpf_rtp_stream_t *rtp_stream, rtp_transmitter_t *transmitter, const mpf_frame_t *frame)
{
char packet_data[20];
apr_size_t packet_size = sizeof(rtp_header_t) + sizeof(mpf_named_event_frame_t);
rtp_header_t *header = (rtp_header_t*) packet_data;
mpf_named_event_frame_t *named_event = (mpf_named_event_frame_t*)(header+1);
rtp_header_prepare(
transmitter,
header,
rtp_stream->base->tx_event_descriptor->payload_type,
(frame->marker == MPF_MARKER_START_OF_EVENT) ? 1 : 0,
transmitter->timestamp_base);
*named_event = frame->event_frame;
named_event->edge = (frame->marker == MPF_MARKER_END_OF_EVENT) ? 1 : 0;
header->sequence = htons(++transmitter->last_seq_num);
RTP_TRACE("> RTP time=%6lu ssrc=%8lx pt=%3u %cts=%9lu seq=%5u event=%2u dur=%3u %c\n",
(apr_uint32_t)apr_time_usec(apr_time_now()),
transmitter->sr_stat.ssrc,
header->type, (header->marker == 1) ? '*' : ' ',
header->timestamp, transmitter->last_seq_num,
named_event->event_id, named_event->duration,
(named_event->edge == 1) ? '*' : ' ');
header->timestamp = htonl(header->timestamp);
named_event->duration = htons((apr_uint16_t)named_event->duration);
if(apr_socket_sendto(
rtp_stream->rtp_socket,
rtp_stream->rtp_r_sockaddr,
0,
packet_data,
&packet_size) != APR_SUCCESS) {
return FALSE;
}
transmitter->sr_stat.sent_packets++;
transmitter->sr_stat.sent_octets += sizeof(mpf_named_event_frame_t);
return TRUE;
}
static apt_bool_t mpf_rtp_stream_transmit(mpf_audio_stream_t *stream, const mpf_frame_t *frame)
{
apt_bool_t status = TRUE;
mpf_rtp_stream_t *rtp_stream = stream->obj;
rtp_transmitter_t *transmitter = &rtp_stream->transmitter;
transmitter->timestamp += transmitter->samples_per_frame;
if(frame->type == MEDIA_FRAME_TYPE_NONE) {
if(!transmitter->inactivity) {
if(transmitter->current_frames == 0) {
/* set inactivity (ptime alligned) */
transmitter->inactivity = 1;
if(rtp_stream->settings->rtcp == TRUE && rtp_stream->settings->rtcp_bye_policy == RTCP_BYE_PER_TALKSPURT) {
apt_str_t reason = {RTCP_BYE_TALKSPURT_ENDED, sizeof(RTCP_BYE_TALKSPURT_ENDED)-1};
mpf_rtcp_bye_send(rtp_stream,&reason);
}
}
else {
/* ptime allignment */
status = mpf_rtp_data_send(rtp_stream,transmitter,frame);
}
}
return status;
}
if((frame->type & MEDIA_FRAME_TYPE_EVENT) == MEDIA_FRAME_TYPE_EVENT){
/* transmit event as soon as received */
if(stream->tx_event_descriptor) {
if(frame->marker == MPF_MARKER_START_OF_EVENT) {
/* store start time (base) of the event */
transmitter->timestamp_base = transmitter->timestamp;
}
else if(frame->marker == MPF_MARKER_NEW_SEGMENT) {
/* update base in case of long-lasting events */
transmitter->timestamp_base = transmitter->timestamp;
}
status = mpf_rtp_event_send(rtp_stream,transmitter,frame);
}
}
if((frame->type & MEDIA_FRAME_TYPE_AUDIO) == MEDIA_FRAME_TYPE_AUDIO){
if(transmitter->current_frames == 0) {
rtp_header_t *header = (rtp_header_t*)transmitter->packet_data;
rtp_header_prepare(
transmitter,
header,
stream->tx_descriptor->payload_type,
transmitter->inactivity,
transmitter->timestamp);
transmitter->packet_size = sizeof(rtp_header_t);
if(transmitter->inactivity) {
transmitter->inactivity = 0;
}
}
status = mpf_rtp_data_send(rtp_stream,transmitter,frame);
}
return status;
}
